KR102188070B1 - Method for transmitting and receiving sounding reference signal in wireless communication system, and apparatus therefor - Google Patents

Abstract

In the present invention, a method and apparatus for transmitting and receiving a sounding reference signal (SRS) in a wireless communication system are disclosed.
Specifically, a method of performing SRS transmission by a terminal in a wireless communication system includes the steps of: receiving configuration information for transmission of the SRS from a base station; The configuration information includes information on one or more SRS resources for transmission of the SRS and usage of the one or more SRS resources, and transmission of the SRS by using the one or more SRS resources to the base station Including the step of performing, when a guard period related to the one or more SRS resources is set, and transmission of the guard period and a specific uplink channel set for the terminal overlap, The priority between the guard period and the specific uplink channel may be set equal to the priority between the SRS and the specific uplink channel.

Description

Method for transmitting and receiving sounding reference signal in wireless communication system, and apparatus therefor

The present invention relates to a wireless communication system, and more particularly, to a method for transmitting and receiving a sounding reference signal and an apparatus supporting the same.

Mobile communication systems have been developed to provide voice services while ensuring user activity. However, the mobile communication system has expanded to not only voice but also data services, and nowadays, the explosive increase in traffic causes a shortage of resources and users request higher speed services, so a more advanced mobile communication system is required. .

The requirements of the next-generation mobile communication system are largely explosive data traffic acceptance, dramatic increase in transmission rate per user, largely increased number of connected devices, very low end-to-end latency, and support for high energy efficiency. You should be able to. To this end, dual connectivity, Massive Multiple Input Multiple Output (MIMO), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), and Super Wideband Various technologies such as wideband) support and device networking are being studied.

The present specification proposes a method of transmitting and receiving a sounding reference signal (SRS) in a wireless communication system.

Specifically, this specification proposes a method of setting and/or indicating a guard period for transmitting and receiving the SRS.

In particular, we propose a method of setting and/or indicating a guard period in consideration of SRS transmission and reception and other uplink transmission (eg, Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), etc.).

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. I will be able to.

In a method for a terminal to transmit a sounding reference signal (SRS) in a wireless communication system according to an embodiment of the present invention, the method comprises: receiving configuration information for transmission of the SRS from a base station. step; The configuration information includes information on one or more SRS resources for transmission of the SRS and usage of the one or more SRS resources, and transmission of the SRS by using the one or more SRS resources to the base station Including the step of performing, wherein a guard period related to the one or more SRS resources is set, and transmission of the guard period and a specific uplink channel set for the terminal overlap (overlap) If yes, the priority between the guard period and the specific uplink channel may be set equal to the priority between the SRS and the specific uplink channel.

In addition, in the method according to an embodiment of the present invention, when the purpose is set to antenna switching, the guard period may be set for the antenna switching.

In addition, in the method according to an embodiment of the present invention, the specific uplink channel is a physical uplink control channel (PUCCH) for reporting channel state information (CSI) or for beam failure revocer. I can.

In addition, in the method according to an embodiment of the present invention, when the PUCCH is configured for beam failure recovery, SRS resources and guard intervals overlapping with the PUCCH may be dropped.

In addition, in the method according to an embodiment of the present invention, the number of symbols in the guard interval may be set in consideration of a subcarrier spacing set for transmission of the SRS.

In addition, in the method according to an embodiment of the present invention, the number of symbols in the guard interval may be 1 or 2.

In addition, in the method according to an embodiment of the present invention, the configuration information for the guard interval may be set for each SRS resource set through higher layer signaling.

In addition, in the method according to an embodiment of the present invention, the setting information on the guard interval includes a starting position index of the guard interval, the number of symbols of the guard interval, and/or adjacent to the transmission of the SRS. It may include information indicating whether the guard period is set between transmissions of different uplink channels.

In addition, in the method according to an embodiment of the present invention, when the guard interval is not set, the terminal transmits uplink transmission before the guard interval and uplink transmission after the guard interval with the same transmission beam. ) Can be set to perform.

In addition, in the method according to an embodiment of the present invention, the transmission beam may be indicated by an SRS resource indicator (SRI) and/or a transmit precoder matrix indicator (TPMI). .

In a terminal that transmits a sounding reference signal (SRS) in a wireless communication system according to an embodiment of the present invention, the terminal comprises a radio frequency (RF) unit and the RF unit for transmitting and receiving a radio signal. And a processor functionally connected to the processor, wherein the processor receives configuration information for transmission of the SRS from a base station; The base station controls to perform the transmission of the SRS using one or more SRS resources, but the configuration information includes one or more SRS resources for the transmission of the SRS and the usage of the one or more SRS resources. Information, and when a guard period related to the one or more SRS resources is set, and transmission of the guard period and a specific uplink channel set for the terminal overlap, The priority between the guard period and the specific uplink channel may be set equal to the priority between the SRS and the specific uplink channel.

In addition, in the terminal according to an embodiment of the present invention, when the purpose is set to antenna switching, the guard period may be set for the antenna switching.

In addition, in the terminal according to an embodiment of the present invention, the specific uplink channel is a physical uplink control channel (PUCCH) for reporting channel state information (CSI) or for beam failure revocer. I can.

In addition, in the terminal according to an embodiment of the present invention, the number of symbols of the guard interval may be set in consideration of a subcarrier spacing set for transmission of the SRS.

In a base station that receives a sounding reference signal (SRS) in a wireless communication system according to an embodiment of the present invention, the base station comprises a radio frequency (RF) unit for transmitting and receiving a radio signal and the RF unit And a processor functionally connected to the terminal, wherein the processor transmits configuration information for transmission of the SRS to the terminal; From the terminal, control to perform the reception of the SRS using one or more SRS resources, but the configuration information includes one or more SRS resources for transmission of the SRS and the usage of the one or more SRS resources. Information, and when a guard period related to the one or more SRS resources is set, and transmission of the guard period and a specific uplink channel set for the terminal overlap, The priority between the guard period and the specific uplink channel may be set equal to the priority between the SRS and the specific uplink channel.

According to an embodiment of the present invention, even when SRS transmission and reception to which antenna switching is applied and other uplink transmission are performed adjacently, there is an effect that the terminal can perform efficient uplink transmission through the guard period.

In addition, according to the guard interval setting and priority setting according to an embodiment of the present invention, there is an effect of preventing a phenomenon in which uplink transmission is distorted due to collision between SRS resources.

The effects that can be obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. .

The accompanying drawings, which are included as part of the detailed description to aid in understanding of the present invention, provide embodiments of the present invention, and describe the technical features of the present invention together with the detailed description.
1 shows an example of an overall system structure of an NR to which the method proposed in the present specification can be applied.
2 shows a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification can be applied.
3 shows an example of a frame structure in an NR system.
4 shows an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.
5 shows examples of an antenna port and a resource grid for each neurology to which the method proposed in the present specification can be applied.
6 shows an example of a self-contained structure to which the method proposed in the present specification can be applied.
7 illustrates a transceiver unit model in a wireless communication system to which the present invention can be applied.
8 shows an example of a hybrid beamforming structure in terms of a TXRU and a physical antenna.
9 shows an operation of beam sweeping for synchronization signals and system information.
10 shows an example of a method of setting an SRS hopping pattern.
11 shows an example of uplink transmission in consideration of a transmission offset for a UL grant and an SRS triggering offset.
12 shows an example of PUSCH transmission and SRS transmission to which the method proposed in this specification can be applied.
13 shows another example of PUSCH transmission and SRS transmission to which the method proposed in this specification can be applied.
14 shows another example of PUSCH transmission and SRS transmission to which the method proposed in this specification can be applied.
15 shows another example of a PUCCH transmission and SRS transmission method to which the method proposed in the present invention can be applied.
16 shows an example of a PUSCH transmission, PUCCH transmission, and SRS transmission method to which the method proposed in the present specification can be applied.
17 shows an example of a flowchart of an operation of a terminal performing SRS transmission in a wireless communication system to which the method proposed in the present specification can be applied.
18 shows an example of an operation flowchart of a base station performing SRS reception in a wireless communication system to which the method proposed in this specification can be applied.
19 illustrates a block diagram of a wireless communication device to which the methods proposed in the present specification can be applied.
20 illustrates a block diagram of a communication device according to an embodiment of the present invention.
21 is a diagram showing an example of an RF module of a wireless communication device to which the method proposed in the present specification can be applied.
22 is a diagram illustrating another example of an RF module of a wireless communication device to which the method proposed in the present specification can be applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description to be disclosed hereinafter together with the accompanying drawings is intended to describe exemplary embodiments of the present invention, and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details to provide a thorough understanding of the invention. However, one of ordinary skill in the art appreciates that the invention may be practiced without these specific details.

In some cases, in order to avoid obscuring the concept of the present invention, well-known structures and devices may be omitted, or may be shown in a block diagram form centering on core functions of each structure and device.

In the present specification, a base station has a meaning as a terminal node of a network that directly communicates with a terminal. The specific operation described as being performed by the base station in this document may be performed by an upper node of the base station in some cases. That is, it is apparent that various operations performed for communication with a terminal in a network comprising a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. 'Base Station (BS)' is a fixed station, Node B, evolved-NodeB (eNB), base transceiver system (BTS), access point (AP), general NB, generation NB (gNB) May be replaced by terms such as. In addition,'Terminal' may be fixed or mobile, and UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS ( Advanced Mobile Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device.

Hereinafter, downlink (DL) refers to communication from a base station to a terminal, and uplink (UL) refers to communication from a terminal to a base station. In downlink, the transmitter may be part of the base station, and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal, and the receiver may be part of the base station.

Specific terms used in the following description are provided to aid understanding of the present invention, and the use of these specific terms may be changed in other forms without departing from the technical spirit of the present invention.

The following technologies are CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access), NOMA It can be used in various wireless access systems such as (non-orthogonal multiple access). CDMA may be implemented with universal terrestrial radio access (UTRA) or radio technology such as CDMA2000. TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented with a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (evolved UTRA). UTRA is part of a universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. LTE-A (advanced) is an evolution of 3GPP LTE.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802, 3GPP, and 3GPP2 wireless access systems. That is, among the embodiments of the present invention, steps or parts not described to clearly reveal the technical idea of the present invention may be supported by the above documents. In addition, all terms disclosed in this document can be described by the standard document.

In order to clarify the explanation, 3GPP LTE/LTE-A/NR (New RAT) is mainly described, but the technical features of the present invention are not limited thereto.

As the spread of smartphones and Internet of Things (IoT) terminals is rapidly spreading, the amount of information exchanged through a communication network is increasing. Accordingly, in the next-generation wireless access technology, an environment that provides faster service to more users than an existing communication system (or an existing radio access technology) (e.g., enhanced mobile broadband communication) )) needs to be considered.

To this end, a design of a communication system considering Machine Type Communication (MTC), which provides a service by connecting a plurality of devices and objects, is being discussed. In addition, a design diagram of a communication system (e.g., URLLC (Ultra-Reliable and Low Latency Communication)) that considers a service and/or terminal sensitive to communication reliability and/or latency. It is being discussed.

Hereinafter, in this specification, for convenience of description, the next-generation radio access technology is referred to as NR (New RAT, Radio Access Technology), and the wireless communication system to which the NR is applied is referred to as an NR system.

Definition of terms

eLTE eNB: eLTE eNB is an evolution of eNB that supports connectivity to EPC and NGC.

gNB: A node that supports NR as well as connection with NGC.

New RAN: A radio access network that supports NR or E-UTRA or interacts with NGC.

Network slice: A network slice is a network defined by an operator to provide an optimized solution for specific market scenarios that require specific requirements with end-to-end coverage.

Network function: A network function is a logical node within a network infrastructure with well-defined external interfaces and well-defined functional behaviors.

NG-C: Control plane interface used for the NG2 reference point between the new RAN and NGC.

NG-U: User plane interface used for the NG3 reference point between the new RAN and NGC.

Non-standalone NR: A deployment configuration in which gNB requires LTE eNB as an anchor for control plane connection to EPC or eLTE eNB as an anchor for control plane connection to NGC.

Non-standalone E-UTRA: Deployment configuration in which eLTE eNB requires gNB as an anchor for control plane connection to NGC.

User plane gateway: The endpoint of the NG-U interface.

System general

1 shows an example of an overall system structure of an NR to which the method proposed in the present specification can be applied.

1, the NG-RAN is composed of gNBs that provide a control plane (RRC) protocol termination for an NG-RA user plane (new AS sublayer/PDCP/RLC/MAC/PHY) and a user equipment (UE). do.

The gNBs are interconnected through an X _n interface.

The gNB is also connected to the NGC through the NG interface.

More specifically, the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and a User Plane Function (UPF) through an N3 interface.

NR (New Rat) Numerology and Frame Structure

In the NR system, multiple numerologies can be supported. Here, the neurology may be defined by subcarrier spacing and CP (Cyclic Prefix) overhead. In this case, the plurality of subcarrier intervals may be derived by scaling the basic subcarrier interval by an integer N (or μ ). Further, even if it is assumed that a very low subcarrier spacing is not used at a very high carrier frequency, the neurology to be used can be selected independently of the frequency band.

In addition, in the NR system, various frame structures according to a number of neurology may be supported.

In addition, the neurology can be set in a structure in which time/frequency granularity is dynamically allocated according to each service (e.g., eMBB, URLLC, mMTC, etc.) and scenarios (e.g., high speed, etc.). have.

Hereinafter, an Orthogonal Frequency Division Multiplexing (OFDM) neurology and frame structure that can be considered in an NR system will be described.

A number of OFDM neurology supported in the NR system may be defined as shown in Table 1.

의 시간 단위의 배수로 표현된다. 여기에서,

이고,

이다. 하향링크(downlink) 및 상향링크(uplink) 전송은

의 구간을 가지는 무선 프레임(radio frame)으로 구성된다. 여기에서, 무선 프레임은 각각

의 구간을 가지는 10 개의 서브프레임(subframe)들로 구성된다. 이 경우, 상향링크에 대한 한 세트의 프레임들 및 하향링크에 대한 한 세트의 프레임들이 존재할 수 있다.Regarding the frame structure in the NR system, the sizes of various fields in the time domain are

Is expressed as a multiple of the unit of time. From here,

ego,

to be. Downlink and uplink transmission

It is composed of a radio frame having a section of. Here, each radio frame

It consists of 10 subframes having a section of. In this case, there may be one set of frames for uplink and one set of frames for downlink.

2 shows a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification can be applied.

이전에 시작해야 한다.As shown in Figure 2, the transmission of the uplink frame number i from the terminal (User Equipment, UE) than the start of the downlink frame in the corresponding terminal

You have to start before.

의 증가하는 순서로 번호가 매겨지고, 무선 프레임 내에서

의 증가하는 순서로 번호가 매겨진다. 하나의 슬롯은

의 연속하는 OFDM 심볼들로 구성되고,

는, 이용되는 뉴머롤로지 및 슬롯 설정(slot configuration)에 따라 결정된다. 서브프레임에서 슬롯

의 시작은 동일 서브프레임에서 OFDM 심볼

의 시작과 시간적으로 정렬된다.For neurology μ , the slots are

Are numbered in increasing order of, within the radio frame

Are numbered in increasing order. One slot is

It is composed of consecutive OFDM symbols of,

Is determined according to the used neurology and slot configuration. Slot in subframe

The start of the OFDM symbol in the same subframe

Is aligned in time with the beginning of.

Not all UEs can simultaneously transmit and receive, which means that all OFDM symbols of a downlink slot or an uplink slot cannot be used.

), 무선 프레임 별 슬롯의 개수(

), 서브프레임 별 슬롯의 개수(

)를 나타내며, 표 3은 확장(extended) CP에서 슬롯 별 OFDM 심볼의 개수, 무선 프레임 별 슬롯의 개수, 서브프레임 별 슬롯의 개수를 나타낸다.Table 2 shows the number of OFDM symbols per slot in a normal CP (

), the number of slots per radio frame (

), the number of slots per subframe (

), and Table 3 shows the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in an extended CP.

3 shows an example of a frame structure in an NR system. 3 is merely for convenience of description and does not limit the scope of the present invention.

In the case of Table 3, as an example of a case where μ = 2, that is, a case where the subcarrier spacing (SCS) is 60 kHz, referring to Table 2, 1 subframe (or frame) may include 4 slots. , 1 subframe={1,2,4} slots shown in FIG. 3 are examples, and the number of slot(s) that may be included in 1 subframe may be defined as shown in Table 2.

Also, a mini-slot may be composed of 2, 4 or 7 symbols, or may be composed of more or fewer symbols.

In relation to the physical resource in the NR system, an antenna port, a resource grid, a resource element, a resource block, a carrier part, etc. Can be considered.

Hereinafter, the physical resources that can be considered in the NR system will be described in detail.

First, with respect to the antenna port, the antenna port is defined such that a channel carrying a symbol on the antenna port can be inferred from a channel carrying another symbol on the same antenna port. When the large-scale property of a channel carrying a symbol on one antenna port can be inferred from a channel carrying a symbol on another antenna port, the two antenna ports are QC/QCL (quasi co-located or quasi co-location) relationship. Here, the wide range characteristic includes one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

4 shows an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.

서브캐리어들로 구성되고, 하나의 서브프레임이 14·2^μ OFDM 심볼들로 구성되는 것을 예시적으로 기술하나, 이에 한정되는 것은 아니다.Referring to Figure 4, the resource grid on the frequency domain

Although it is composed of subcarriers and one subframe is composed of 14·2 ^μ OFDM symbols, it is exemplarily described, but is not limited thereto.

서브캐리어들로 구성되는 하나 또는 그 이상의 자원 그리드들 및

의 OFDM 심볼들에 의해 설명된다. 여기에서,

이다. 상기

는 최대 전송 대역폭을 나타내고, 이는, 뉴머롤로지들뿐만 아니라 상향링크와 하향링크 간에도 달라질 수 있다.In the NR system, the transmitted signal is

One or more resource grids composed of subcarriers and

Is described by the OFDM symbols. From here,

to be. remind

Denotes a maximum transmission bandwidth, which may vary between uplink and downlink as well as neurology.

In this case, as shown in FIG. 5, one resource grid may be set for each neurology μ and antenna port p.

5 shows examples of an antenna port and a resource grid for each neurology to which the method proposed in the present specification can be applied.

에 의해 고유적으로 식별된다. 여기에서,

는 주파수 영역 상의 인덱스이고,

는 서브프레임 내에서 심볼의 위치를 지칭한다. 슬롯에서 자원 요소를 지칭할 때에는, 인덱스 쌍

이 이용된다. 여기에서,

이다.Each element of the resource grid for the neurology μ and antenna port p is referred to as a resource element, and an index pair

Is uniquely identified by From here,

Is the index in the frequency domain,

Refers to the position of a symbol within a subframe. When referring to a resource element in a slot, an index pair

Is used. From here,

to be.

는 복소 값(complex value)

에 해당한다. 혼동(confusion)될 위험이 없는 경우 혹은 특정 안테나 포트 또는 뉴머롤로지가 특정되지 않은 경우에는, 인덱스들 p 및μ는 드롭(drop)될 수 있으며, 그 결과 복소 값은

또는

이 될 수 있다.Resource elements for neurology μ and antenna port p

Is a complex value

Corresponds to. In cases where there is no risk of confusion, or if a specific antenna port or neurology is not specified, the indices p and μ may be dropped, resulting in a complex value

or

Can be

연속적인 서브캐리어들로 정의된다.In addition, the physical resource block (physical resource block) in the frequency domain

It is defined as consecutive subcarriers.

Point A serves as a common reference point of the resource block grid and can be obtained as follows.

-OffsetToPointA for the PCell downlink represents the frequency offset between the lowest subcarrier of the lowest resource block and point A of the lowest resource block overlapping the SS/PBCH block used by the UE for initial cell selection, and a 15 kHz subcarrier spacing for FR1 It is expressed in resource block units assuming a 60 kHz subcarrier spacing for FR2;

-absoluteFrequencyPointA represents the frequency-position of point A expressed as in the absolute radio-frequency channel number (ARFCN).

에 대한 주파수 영역에서 0부터 위쪽으로 넘버링(numbering)된다.Common resource blocks set the subcarrier interval

Numbered from 0 to the top in the frequency domain for.

에 대한 공통 자원 블록 0의 subcarrier 0의 중심은 'point A'와 일치한다. 주파수 영역에서 공통 자원 블록 번호(number)

와 서브캐리어 간격 설정

에 대한 자원 요소(k,l)은 아래 수학식 1과 같이 주어질 수 있다.Subcarrier spacing setting

The center of subcarrier 0 of the common resource block 0 for is coincided with'point A'. Common resource block number (number) in the frequency domain

And subcarrier spacing

The resource element (k,l) for may be given as in Equation 1 below.

[Equation 1]

까지 번호가 매겨지고, i는 BWP의 번호이다. BWP i에서 물리 자원 블록

와 공통 자원 블록

간의 관계는 아래 수학식 2에 의해 주어질 수 있다.Here, k can be defined relative to point A so that k = 0 corresponds to a subcarrier centered on point A. Physical resource blocks are from 0 in the bandwidth part (BWP)

And i is the number of the BWP. Physical resource block in BWP i

And common resource block

The relationship between may be given by Equation 2 below.

[Equation 2]

는 BWP가 공통 자원 블록 0에 상대적으로 시작하는 공통 자원 블록일 수 있다.From here,

May be a common resource block in which the BWP starts relative to the common resource block 0.

Self-contained structure

The TDD (Time Division Duplexing) structure considered in the NR system is a structure that processes both uplink (UL) and downlink (DL) in one slot (or subframe). This is for minimizing the latency of data transmission in the TDD system, and the structure may be referred to as a self-contained structure or a self-contained slot.

6 shows an example of a self-contained structure to which the method proposed in the present specification can be applied. 5 is only for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 6, as in the case of legacy LTE, it is assumed that one transmission unit (eg, slot, subframe) is composed of 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols.

In FIG. 6, region 602 refers to a downlink control region, and region 604 refers to an uplink control region. In addition, regions other than regions 602 and 604 (that is, regions without a separate indication) may be used for transmission of downlink data or uplink data.

That is, uplink control information and downlink control information may be transmitted in one self-contained slot. On the other hand, in the case of data, uplink data or downlink data may be transmitted in one self-contained slot.

When the structure shown in FIG. 6 is used, downlink transmission and uplink transmission are sequentially performed within one self-contained slot, and downlink data transmission and uplink ACK/NACK reception may be performed.

As a result, when an error in data transmission occurs, the time required to retransmit data may be reduced. Through this, a delay related to data transfer can be minimized.

In the self-contained slot structure as shown in FIG. 6, a process in which a base station (eNodeB, eNB, gNB) and/or a terminal (user equipment (UE)) switches from a transmission mode to a reception mode Alternatively, a time gap is required for the process of switching from the reception mode to the transmission mode. Regarding the time gap, when uplink transmission is performed after downlink transmission in the self-contained slot, some OFDM symbol(s) may be set as a guard period (GP).

PUCCH format in NR system

In the NR system, a number of PUCCH formats may be defined by duration and/or payload size. As an example, Table 4 below shows PUCCH formats considered in the NR system.

Referring to Table 4, format 0 and format 2 may be classified as short PUCCH (short PUCCH), and format 1, format 3 and format 4 may be classified as long PUCCH (long PUCCH). In the NR system, a transmit diversity scheme for PUCCH and simultaneous transmission of PUSCH and PUCCH may not be supported.

NR antenna switching

The NR system can support inter-slot antenna switching and intra-slot antenna switching. In the case of intra-slot antenna switching, a guard period may be set.

In the case of 1 tansmission 2 reception (1T2R) / 2 tansmission 4 reception (1T4R), the UE may be configured with two SRS resources consisting of one symbol or two symbols. On the other hand, in the case of 1T4R (1 tansmission 4 reception), the terminal may be configured with four SRS resources that are all single symbols and single ports.

Each port of the configured resource may be associated with a different terminal antenna.

Analog beamforming

In the millimeter wave (mmW), the wavelength is shortened, so that a plurality of antenna elements can be installed in the same area. That is, in the 30GHz band, the wavelength is 1cm, and a total of 64 (8x8) antenna elements are formed in a 2-dimensional array with 0.5 lambda (i.e., wavelength) intervals on a 4 X 4 (4 by 4) cm panel. Installation is possible. Therefore, in mmW, a plurality of antenna elements are used to increase beamforming (BF) gain to increase coverage or to increase throughput.

In this case, if a transceiver unit (TXRU) is provided to enable transmission power and phase adjustment for each antenna element, independent beamforming for each frequency resource is possible. However, to install TXRUs on all of the 100 antenna elements, there is a problem that the effectiveness is inferior in terms of price. Therefore, a method of mapping a plurality of antenna elements to one TXRU and adjusting the direction of a beam with an analog phase shifter is being considered. This analog BF scheme has a disadvantage in that it cannot perform frequency selective BF because it can create only one beam direction in the entire band.

It is possible to consider hybrid beamforming (hybrid BF) having B TXRUs that are less than Q antenna elements in the intermediate form of digital BF and analog BF. In this case, although there is a difference depending on the connection method of the B TXRUs and Q antenna elements, the directions of beams that can be simultaneously transmitted are limited to B or less.

Hereinafter, representative examples of a connection method between a TXRU and an antenna element will be described with reference to the drawings.

7 illustrates a transceiver unit model in a wireless communication system to which the present invention can be applied.

The TXRU virtualization model represents the relationship between the output signal of the TXRU and the output signal of the antenna elements. TXRU virtualization model option-1 as shown in FIG. 7(a) according to the correlation between antenna element and TXRU: sub-array partition model and TXRU virtualization model option as shown in FIG. 7(b) -2: Can be classified into a full-connection model.

Referring to FIG. 7(a), in the case of a sub-array partition model, an antenna element is divided into multiple antenna element groups, and each TXRU is connected to one of the groups. In this case, the antenna element is connected to only one TXRU.

Referring to FIG. 7(b), in the case of a full-connection model, signals of multiple TXRUs are combined and transmitted to a single antenna element (or array of antenna elements). That is, this indicates a method in which the TXRU is connected to all antenna elements. In this case, the antenna elements are connected to all TXRUs.

In FIG. 7, q is a transmission signal vector of M antenna elements having the same polarization (co-polarized) in one column. w is a wideband TXRU virtualization weight vector, and W is a phase vector multiplied by an analog phase shifter. That is, the direction of analog beamforming is determined by W. x is a signal vector of M_TXRU TXRUs.

Here, the mapping between the antenna port and the TXRUs may be one-to-one (1-to-1) or one-to-many (1-to-many).

In FIG. 7, the TXRU-to-element mapping between the TXRU and the antenna element is merely an example, and the present invention is not limited thereto, and the TXRU and antenna element that can be implemented in various other forms from a hardware perspective The present invention can be applied equally to the mapping between the two.

Hybrid beamforming

In a New RAT (NR) system, when a plurality of antennas are used, a hybrid beamforming technique combining digital beamforming and analog beamforming is considered.

In this case, analog beamforming (or RF beamforming) may refer to an operation of performing precoding (or combining) at the RF end. In hybrid beamforming, the baseband stage and the RF stage each perform precoding (or combining), thereby reducing the number of RF chains and the number of D(Digital)/A(Analog) (or A/D) converters. At the same time, it has the advantage of being able to achieve a performance close to digital beamforming.

The hybrid beamforming structure may be represented by N transceiver units (TXRU) and M physical antennas. The digital beamforming for L data layers to be transmitted from the transmitter can be expressed as an N by L (N x L) matrix, and the converted N digital signals are then converted to analog signals through TXRU. Next, analog beamforming represented by an M by N (M x N) matrix may be applied.

8 shows an example of a hybrid beamforming structure in terms of a TXRU and a physical antenna.

Referring to FIG. 8, it is assumed that the number of digital beams is L and the number of analog beams is N.

In addition, in the NR system, a method of supporting more efficient beamforming to a terminal located in a specific area by designing a base station to change analog beamforming in units of symbols is also considered. In addition, when defining specific N TXRUs and M RF antennas as one antenna panel in FIG. 8, a method of introducing a plurality of antenna panels to which independent hybrid beamforming can be applied in the NR system is also considered. Has become.

As described above, when a base station uses a plurality of analog beams, analog beams that are advantageous for signal reception may be different for each terminal, so at least a specific sub is applied to a synchronization signal, system information, paging, etc. A beam sweeping operation in which a plurality of analog beams to be applied by a base station in a frame (Subframe, SF) is changed for each symbol so that all terminals can have a reception opportunity is considered.

9 shows an operation of beam sweeping for synchronization signals and system information.

Referring to FIG. 9, beam sweeping for a synchronization signal and system information in a downlink transmission process is assumed, and a physical resource (or physical channel) through which system information of an NR system is transmitted in a broadcasting method is xPBCH ( x-Physical Broadcast Channel).

At this time, analog beams belonging to different antenna panels within one symbol can be simultaneously transmitted, and a single analog beam (corresponding to a specific antenna panel) is applied as shown in Fig. 9 below to measure channels for each analog beam. A method of introducing a beam RS (BRS), which is a reference signal (RS) to be transmitted, may be considered.

Here, the BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam. In this case, unlike the BRS, the synchronization signal or xPBCH may be transmitted by applying all analog beams in the analog beam group so that any terminal can receive it well.

SRS transmission in NR system

In the NR system, a sequence of SRSs for SRS resources may be generated according to Equation 3 below.

[Equation 3]

는 SRS의 시퀀스 번호(sequence number, v) 및 시퀀스 그룹(sequence group, u)에 의해 설정된 시퀀스를 나타내며, 전송 콤브(transmission comb, TC) 번호 K_TC(K _TC)는 상위 계층 파라미터인 SRS-TransmissionComb에 포함될 수 있다.In Equation 3,

Represents a sequence set by the sequence number (v) and sequence group (u) of the SRS, and the transmission comb (TC) number K_TC ( K _TC ) is in the upper layer parameter SRS-TransmissionComb. Can be included.

에 대한 순환 쉬프트(cyclic shift, SC)

는 아래 수학식 4와 같이 주어질 수 있다.Also, the antenna port

Cyclic shift (SC)

May be given as in Equation 4 below.

[Equation 4]

는 상위 계층 파라미터 SRS-CyclicShiftConfig에 의해 주어질 수 있다. 또한, 순환 쉬프트의 최대 값(maximum number)은 K_TC가 4인 경우 12(즉,

)이며, K_TC가 2인 경우 8(즉,

)일 수 있다.In Equation 4,

May be given by the upper layer parameter SRS-CyclicShiftConfig. In addition, the maximum number of cyclic shift is 12 (that is, when K_TC is 4)

), and 8 when K_TC is 2 (that is,

) Can be.

) 및 시퀀스 번호(u)는 상위 계층 파라미터 SRS-GroupSequenceHopping에 따를 수 있다. 또한, SRS 시퀀스 식별자

는 상위 계층 파라미터 SRS-SequenceId에 의해 주어질 수 있다. l'(즉,

)는 해당 SRS 자원 내의 OFDM 심볼 번호(OFDM symbol number)를 나타낸다.The sequence group (u) (

) And the sequence number u may follow the upper layer parameter SRS-GroupSequenceHopping. Also, the SRS sequence identifier

May be given by the upper layer parameter SRS-SequenceId. l'(i.e.

) Represents an OFDM symbol number in the corresponding SRS resource.

In this case, when the value of SRS-GroupSequenceHopping is 0, group hopping and sequence hopping are not used, and this may be expressed as Equation 5 below.

[Equation 5]

In Equation 5, f_gh(x, y) represents sequence group hopping, and v represents sequence hopping.

Alternatively, when the value of SRS-GroupSequenceHopping is 1, group hopping rather than sequence hopping is used, which may be expressed as Equation 6 below.

[Equation 6]

로 초기화될 수 있다.In Equation 6, f_gh(x, y) represents sequence group hopping, and v represents sequence hopping. In addition, c(i) represents a pseudo-random sequence, and at the beginning of each radio frame

Can be initialized to

Alternatively, when the value of SRS-GroupSequenceHopping is 2, sequence hopping rather than group hopping is used, which may be expressed as Equation 7 below.

[Equation 7]

로 초기화될 수 있다(여기에서,

).In Equation 7, f_gh(x, y) represents sequence group hopping, and v represents sequence hopping. In addition, c(i) represents a pseudo-random sequence, and at the beginning of each radio frame

Can be initialized with (here,

).

Sounding Reference Signal (SRS) hopping

The SRS hopping operation can be performed only during periodic SRS triggering (eg, triggering type 0). In addition, the allocation of SRS resources may be provided according to a pre-defined hopping pattern. In this case, the hopping pattern may be UE-specifically designated as higher layer signaling (eg, RRC signaling), and overlapping cannot be allowed.

In addition, the SRS is frequency hopping using a hopping pattern for each subframe in which the cell-specific and/or terminal-specific SRS is transmitted, and the start position and the hopping formula in the frequency domain of SRS hopping are Equation 8 below. It can be interpreted through

[Equation 8]

In Equation 8, n _SRS denotes a hopping progress interval in the time domain, N _b is the number of branches allocated to tree level b, and b can be determined by setting B _SRS in a dedicated RRC (dedicated RRC). have.

10 shows an example of a method of setting an SRS hopping pattern. Specifically, Figure 10 shows an example of a hopping pattern to the slot n _s = n _s = 4 slots of 1 to

In FIG. 10, C _SRS , N^UL_RB, n _f and n _s are through cell-specific signaling (eg, cell-specific RRC signaling), C _SRS =1, N^UL_RB=100, n _f =1 and n _It is assumed that each is set to _s =1. In addition, for UEs A, B and C, B _SRS , b _hop, n _RRC , and T _SRS may be configured through UE-specific signaling (e.g., UE-specific RRC signaling). Specifically, UE A is set to B _SRS =1, b _hop =1, n _RRC =22, T _SRS =10, and UE B is set to B _SRS =2, b _hop =0, n _RRC =10, T _SRS = It is set to 5, and UE C may be set to B _SRS =3, b _hop =2, n _RRC =23, and T _SRS =2.

As mentioned above, in a next-generation wireless communication system (hereinafter referred to as an NR system for convenience of description), there are terminals (e.g., 1T4R terminals, 1T2R terminals, 2T4R terminals, etc.) that need to perform SRS antenna switching. I can.

When transmission of other uplink channels (e.g., PUSCH (physical uplink shared channel), PUCCH (physical uplink control channel), etc.) is performed, such terminals transmit SRS through the used transmission antenna (Tx antenna) When the antenna is matched, UL transmission can be performed without changing the transmission antenna in a corresponding transmission time unit (eg, a slot, etc.). If not, that is, when the transmission antenna of the different uplink channel and the SRS transmission antenna are different, a transition time for changing the transmission antenna may be required. In other words, it may be necessary to set the symbol(s) in consideration of the transition time between another uplink channel and the SRS.

) 등)에 따라 정의될 수 있다. 일례로, Y 심볼은 Y 개의 OFDM 심볼을 의미할 수 있다.Here, such symbol(s) may be referred to as a guard period (especially, a guard period for antenna switching), and may be composed of a Y symbol. Here, the guard period may be set when performing antenna switching between SRS resources, which is a neurology (μ) (e.g., subcarrier spacing) (

), etc.). As an example, the Y symbol may mean Y OFDM symbols.

The above-described guard period, that is, the Y symbol may be defined as shown in Table 5 below. Table 5 shows an example of a (minimum) guard interval between SRS resources of an SRS resource set for antenna switching. That is, the guard interval may be set in consideration of SRS resources constituting the SRS resource set.

In particular, the timing offset of the PUSCH resource allocated to the UL grant is referred to as X, the timing offset between SRS triggering DCI (SRS triggering DCI) and SRS transmission is referred to as Z, and short PUCCH (sPUCCH). ) Assume that the timing offset of the resource is referred to as M.

In this case, a case where the Z value is smaller than the X value and/or the case where the Z value is smaller than the M value may occur. In this case, transmission of PUSCH, sPUCCH and/or SRS may be allocated to the same slot (eg, slot n) as shown in FIG. 11.

11 shows an example of uplink transmission in consideration of a transmission offset for a UL grant and an SRS triggering offset. 11 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 11, X denotes an offset from a time point when a UE receives a UL grant to a time point at which PUSCH transmission scheduled by a corresponding UL grant is performed, and Z denotes a time point at which the UE receives the DCI triggering the SRS. It may mean an offset from when the transmission of the actual SRS is performed. In this case, slot n may mean a slot in which transmission of the PUSCH scheduled by the UL grant and transmission of the SRS by the SRS triggering DCI are performed (or allocated).

In addition, it is assumed that 4 SRS symbols are allocated to a terminal supporting antenna switching, and the subcarrier interval is 120 kHz (ie, the number of Y symbols is 2). This is only for convenience of description, and of course, it may be extended and applied to a case where a different number of SRS symbol(s) are allocated and a case of a different subcarrier interval (ie, different neurology).

For example, as shown in (a) of FIG. 11, when Z is less than X, when the base station transmits a UL grant (eg, DCI for UL data scheduling) to the terminal, the base station multiplexes with SRS. A resource region that does not take into account may be allocated as a PUSCH resource. Accordingly, in a symbol region adjacent to the SRS among the PUSCH symbol regions allocated as resources for UL data transmission by the base station, performance degradation may occur if the above-described guard interval due to antenna switching of the SRS is not secured. I can. In other words, when PUSCH transmission and SRS transmission are configured to be adjacent, a guard period for antenna switching (ie, a transition time for antenna switching) may be required.

For another example, as shown in (b) of FIG. 11, when Z is less than M, when the base station transmits DCI for triggering PUCCH transmission to the terminal, the base station does not consider multiplexing with the SRS. A region can be allocated as a PUCCH resource. In this case, similar to the above-described example, performance degradation may occur when control information (eg, uplink control information (UCI)) transmitted through PUCCH is detected.

In this specification, in order to prevent such performance degradation, a method of setting and/or indicating a guard period for antenna switching and the like when an uplink transmission different from the SRS transmission is configured is described.

Specifically, in consideration of the relationship between transmission of PUSCH and/or PUCCH and transmission of SRS, a method of setting and/or indicating a guard interval (hereinafter, first embodiment) will be described, and a guard interval and a set of SRS resources (i.e., A solution to a case in which a collision between SRS resources) occurs (hereinafter, a second embodiment) is also described.

In addition, in the present specification, for convenience of description, it is described based on the relationship between the guard interval in the relationship between transmission of the PUSCH and/or PUCCH and the transmission of the SRS, the guard interval and the SRS resource(s) (eg, SRS resource set), It goes without saying that the methods described below are not limited thereto and may be similarly extended and applied in relation to other uplink transmissions.

In addition, for convenience of description, the guard period referred to in this specification is a gap symbol, a gap, a Y symbol, a Y symbol gap, and a Y gap for antenna switching. It may mean a symbol or the like. That is, in the present specification, a guard period, a gap symbol, a gap, a Y symbol, a Y symbol gap, a Y gap symbol, and the like may have the same meaning.

In addition, the embodiments and/or methods described in the present specification are only classified for convenience of description, and some configurations of any method may be substituted with configurations of other methods, or may be applied in combination with configurations of other methods. Of course. For example, the methods described in the first embodiment and the methods described in the second embodiment may be applied in combination with each other.

(Example 1)

In this embodiment, a method of setting and/or indicating a guard interval in consideration of the relationship between transmission of PUSCH and/or PUCCH and transmission of SRS will be described in detail.

As mentioned above, the methods described in this embodiment can be extended and applied to uplink transmission other than PUSCH and/or PUCCH.

Method 1)

In the case of a terminal supporting antenna switching (i.e., a terminal with antenna switching capability), higher layer signaling (e.g., RRC signaling), MAC layer signaling (e.g., MAC-) between PUSCH or PUCCH and SRS transmission CE) and/or a Y symbol (ie, a guard period) may be set and/or indicated through downlink control information (DCI). In this case, the Y symbol may be set and/or indicated in consideration of neurology (eg, subcarrier interval).

In this case, the (setting) information related to the Y symbol may include one or more of the following elements.

-Position index of the Y symbol (e.g., the index of the starting position of the Y symbol)

-Number of Y symbols

-Whether a guard interval is set between PUSCH and/or PUCCH and SRS

In particular, the information on whether a guard interval is set between PUSCH and/or PUCCH and SRS is, when PUSCH and/or PUCCH is transmitted in symbol(s) before SRS, PUSCH and/or PUCCH is symbol after SRS It may be separately set and/or indicated depending on the case of transmission from (s). In addition, the information may be separately set and/or indicated as to whether the guard interval is set before or after SRS transmission in case the SRS is located between PUSCH and/or PUCCH symbols.

In this regard, the position index of the Y symbol and/or the number of Y symbols may be set and/or indicated according to the following methods. That is, the base station may set and/or indicate to the terminal a Y symbol (ie, a guard period) using the settings shown in Tables 6 to 8 below. In other words, the terminal may receive the setting and/or indication of the Y symbol (ie, guard period) from the base station by using the settings shown in Tables 6 to 8 below.

Table 6 below shows an example of setting a Y symbol (ie, a guard interval) (especially when it is set and/or indicated through DCI). Table 6 shows an example of setting a guard interval by joint encoding the position index of the Y symbol and the number of Y symbols (the number of symbols according to the numerology).

Referring to Table 6, a setting for a Y symbol (ie, G_SRS) is expressed in 16 states, and may consist of 4-bit information. For example, when the value of G_SRS is 5, the starting position index of the Y symbol is 11, and the number of Y symbols is 1.

In addition, the position of the Y symbol (ie, the position of the guard interval) may be briefly expressed by signaling information on the'in front of the SRS resource' and/or the'behind the SRS resource'. Table 7 shows an example of setting a guard interval based on the location of the SRS resource.

Referring to Table 7, the setting for the Y symbol (ie, G_SRS) is expressed in 8 states, and may consist of 3-bit information. For example, when the value of G_SRS is 1, the Y symbol (ie, the guard interval) is located in the next symbol of the last set SRS resource, and the number of Y symbols is set to 2.

In addition, as described above, since the number of Y symbols may be determined according to the neurology, the setting for the Y symbol (ie, G_SRS) may be set as shown in Table 8 below. Table 8 shows an example of setting a guard interval using a characteristic determined by the number of Y symbols according to the neurology.

Referring to Table 8, the settings of Table 7 can be simplified as shown in Table 8 by using the characteristic that the number of Y symbols is determined according to the neurology. In this case, the setting for the Y symbol (ie, G_SRS) is expressed in three states, and may be composed of 2-bit information.

Similarly, a method of simultaneously setting or applying a Y symbol (ie, a guard interval) before or after the SRS resource may be considered.

In addition, the presence or absence of a Y symbol (i.e., a guard interval) and/or a position (and/or the number of Y symbols) when it is present is predefined (or set) or implicit by other parameters, etc. Can be determined.

As an example, the location of the Y symbol may be set to the last symbol index +1 of the last SRS resource set to the terminal. In this case, the base station may additionally set and/or indicate to the terminal (through signaling) only whether the guard period is on/off.

In this case, the position of the Y symbol may be determined in consideration of the following items. Hereinafter,'following PUSCH and/or PUCCH' may refer to a case in which a corresponding channel is transmitted with an interval less than Y symbols (especially, immediately adjacent symbols) after SRS resource(s) set in the terminal. In particular, this can be determined in the same manner even when crossing the slot boundary.

First, the location of the Y symbol may be determined in consideration of whether or not a PUSCH allocated to the same slot is transmitted. For example, when PUSCH is transmitted, the Y symbol may be set to be allocated to the front part of the initial SRS resource(s). In contrast, when the PUSCH is not transmitted, the Y symbol may be set to be allocated to the rear part of the last SRS resource(s), or the Y symbol may be set (ie, the Y symbol gap setting) may be turned off. That is, when the PUSCH is transmitted and SRS resource(s) are allocated to the next symbol(s), the UE is a beam allocated to the PUSCH (eg, SRI (SRS resource indicator) and/or TPMI (transmit precoding matrix indicator)) It is assumed that the beam allocated to the SRS resource(s) of the SRS symbol immediately following the PUSCH symbol is in a relationship requiring a gap (i.e., a guard interval) for antenna switching. Can be set to operate.

And/or, the position of the Y symbol may be determined in consideration of whether a subsequent PUSCH exists (ie, is allocated) in a slot immediately following a slot in which SRS transmission is performed. For example, when there is a subsequent PUSCH, the Y symbol may be set to be allocated to the rear part of the last SRS resource(s). On the contrary, if there is no subsequent PUSCH, the Y symbol may be set to be allocated to the rear part of the last SRS resource(s), or the setting for the Y symbol (ie, Y symbol gap setting) may be turned off. . That is, in the immediately next slot of the slot to which the SRS is allocated, the UE has a beam allocated to the PUSCH (e.g., a beam referred to by an SRS resource indicator (SRI) and/or a transmit precoding matrix indicator (TPMI)) and an SRS. The beam allocated to the resource(s) may be set to operate on the assumption that a gap (ie, a guard period) for antenna switching is required.

And/or, when a subsequent PUSCH exists in a slot immediately following a slot in which SRS transmission is performed, the position of the Y symbol may be determined in consideration of whether the first k symbols are allocated to the PUSCH. Here, k may be a positive integer less than or equal to Y. For example, when k=Y is set and the first Y symbols of the subsequent PUSCH are allocated for the PUSCH, the Y symbols may be set to be allocated to the rear part of the last SRS resource(s). Alternatively, if k=Y is set and the first Y symbols of the subsequent PUSCH are not allocated for the PUSCH, the Y symbols may be set to the first Y symbols of the next slot of the slot in which the SRS is transmitted. In particular, in this case, a guard period may be set for the last y1 symbols of the slot in which the SRS is transmitted and the y2 symbols in the next slot of the slot in which the SRS is transmitted. In this case, the sum of y1 and y2 may be set to be greater than or equal to Y.

And/or, the position of the Y symbol may be determined in consideration of whether a subsequent PUCCH exists in a slot in which SRS transmission is performed. For example, when the PUCCH exists, the Y symbol may be set to be allocated to the rear part of the last SRS resource(s). In contrast, when the PUCCH does not exist, the Y symbol may be set to be allocated to the front part of the last SRS resource(s), or the Y symbol may be set (ie, the Y symbol gap setting) may be turned off.

The above-described matters (ie, conditions) may be applied or judged independently, or may be applied or judged in combination by being combined with each other.

Method 1-1)

In addition, when the base station sets the Y symbol between the PUSCH and/or the PUCCH and the SRS (i.e., when setting the symbol gap), the terminal implicitly transmits the transmission beam(s) of the SRS resource(s) closest to the Y symbol It can be operated assuming that is different from the transmission beam of the PUSCH and/or PUCCH adjacent to the corresponding Y symbol. That is, the UE transmits the transmission beam(s) of the SRS resource(s) closest to the Y symbol and the beam(s) and/or antenna port(s) for transmission of the PUSCH or PUCCH adjacent to the corresponding Y symbol. The beam(s) and/or antenna port (ie, different terminal transmission beam(s) and/or antenna port(s)) using different transmit antennas may be assumed and used.

And/or, the UE may perform transmission on the assumption that beam(s) and/or antenna port(s) using the same transmission antenna are configured for the adjacent SRS and PUCCH and/or PUSCH. That is, the terminal (without a Y symbol between) the SRS and PUCCH and / or PUSCH (that is, the Y symbol gap between the PUCCH and / or the PUSCH and the SRS is not set or indicated) that the interval between the two is smaller than the Y symbol With respect to, it may be assumed that transmission is performed using the same beam and/or antenna port.

12 shows an example of PUSCH transmission and SRS transmission to which the method proposed in this specification can be applied. 12 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 12, in the setting for the Y symbol, it is assumed that the number of symbols of the Y symbol is 2 as the starting position index of the Y symbol is 8 and the numerology (ie, subcarrier interval) is 120 kHz (Example : G_SRS=9 in Table 6).

인 경우, n 번째 슬롯에서의 SRS의 전송을 위하여 전송 빔(들)

이 할당될(또는 이용될) 수 있다. 이 경우,

와

는 서로 안테나 스위칭을 통해서 변경될 수 있는 관계에 있다고 가정할 수 있다(즉, 같거나 다를 수 있다). 이 때, 단말은 UL 그랜트 수신 시의 PUSCH 전송을 위한 단말 전송 빔 정보를 통해, Y 심볼(즉, 갭)의 위치에 따라 Y 심볼 다음에 위치하는 SRS 자원(들)의 빔들

선택에 제약을 가지지 않을 수 있다(즉, 서로 다른 전송 안테나를 이용하는 빔).UE transmission beam(s) in which the beam of the PUSCH indicated through the UL grant is mapped to a demodulation reference signal (DMRS) in the PUSCH

In the case of, transmission beam(s) for transmission of SRS in the n-th slot

Can be assigned (or used). in this case,

Wow

May be assumed to be in a relationship that can be changed through antenna switching with each other (ie, they may be the same or different). In this case, the UE transmits the beams of the SRS resource(s) located after the Y symbol according to the position of the Y symbol (i.e., gap) through the UE transmission beam information for PUSCH transmission when the UL grant is received.

There may be no restrictions on selection (ie, beams using different transmit antennas).

13 shows another example of PUSCH transmission and SRS transmission to which the method proposed in this specification can be applied. 13 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 13, in the setting for the Y symbol, it is assumed that the number of symbols of the Y symbol is 2 as the starting position index of the Y symbol is 8 and the numerology (that is, the subcarrier interval) is 120 kHz. : G_SRS=13 in Table 6).

선택에 제약을 가지지 않을 수도 있다. 이와 반대로, SRS 심볼 앞에 PUSCH 심볼들이 바로 인접하여 배치되고 PUSCH의 전송을 위하여 빔(들)

이 설정되면, 단말은 첫 SRS 심볼의 SRS 자원(들)의 빔으로

를 암시적으로 선택하도록 설정될 수 있다. 즉, 단말은 첫 SRS 심볼의 SRS 자원(들)의 빔으로 PUSCH의 전송 안테나와 동일한 전송 안테나를 이용하는 빔을 암시적으로 선택하도록 설정될 수 있다.In this case, in the case of the SRS resource(s) in the symbol preceding the Y symbol (ie, the gap symbol), the UE is a beam in an antenna switching relationship with the beam(s) for PUSCH transmission in the next slot.

You may not have restrictions on your choice. Conversely, PUSCH symbols are arranged immediately in front of the SRS symbol, and beam(s) for transmission of PUSCH

When is set, the terminal is the beam of the SRS resource(s) of the first SRS symbol

Can be set to select implicitly. That is, the terminal may be configured to implicitly select a beam using the same transmission antenna as the transmission antenna of the PUSCH as the beam of the SRS resource(s) of the first SRS symbol.

The above-described scheme can be similarly applied in relation between the SRS and the PUCCH and/or PUSCH even when the PUCCH and/or PUSCH are transmitted after the last SRS resource(s). That is, in this case, the base station may regard the transmission beams of the adjacent PUCCH and/or PUSCH and SRS resources as being transmitted by the terminal using the same transmission antenna.

Method 1-2)

When the base station sets the Y symbol for the guard interval between the PUSCH and/or the PUCCH and the SRS, the base station determines the number of SRS resource(s) allocated in the SRS symbol closest to the Y symbol (i.e., gap symbol) during SRS triggering. The transmission beam(s) and/or antenna port(s) are transmitted to the beam(s) and/or antenna port(s) through which the PUSCH and/or PUCCH is transmitted and the beam(s) and/or antenna port ( S) can be designated (or indicated). In other words, when the Y symbol is set between the SRS and the PUSCH and/or PUCCH, the base station uses different (using a terminal transmission antenna) transmission beam(s) and/or the beam for the SRS resource and the beam for the PUSCH and/or PUCCH. Or it can be designated as antenna port(s).

And/or, when the base station is configured adjacent to each other without a Y symbol between the SRS and the PUSCH and/or PUCCH, the beam(s) and/or antenna port(s) using the same transmit antennas (e.g., the same beam ( S) and/or antenna port(s)) to the terminal.

At this time, as a method of designating beam(s) and/or antenna port(s), in the case of non-codebook based UL transmission, PUSCH and/or among SRI(s) previously transmitted by the base station Alternatively, a method of transmitting SRI(s) indicating (ie, indicating) beam(s) in an antenna switching relationship with the PUCCH beam(s) to the terminal may be considered. Or, in the case of codebook-based UL transmission, refers to the beam(s) in an antenna switching relationship with the PUSCH and/or PUCCH beam(s) among the TPMI(s) previously transmitted by the base station (i.e., indication) A method of transmitting the TPMI(s) to the terminal may be considered.

In addition, when the UE receives the PUSCH and/or PUCCH and SRS configured (or indicated) without a Y symbol (ie, a gap symbol), the corresponding PUSCH and/or PUCCH and the adjacent SRS resource (and/or symbol) are different beams ( S) and/or antenna port(s) may not be expected to be set (or indicated).

14 shows another example of PUSCH transmission and SRS transmission to which the method proposed in this specification can be applied. 14 is merely for convenience of description and does not limit the scope of the present invention. Specifically, FIG. 15 shows an example of a guard period (ie, a Y symbol) for antenna switching with a PUSCH and/or PUCCH and a method of configuring a corresponding SRS beam during SRS triggering.

Referring to FIG. 14, in the setting for the Y symbol, it is assumed that the number of symbols of the Y symbol is 2 as the starting position index of the Y symbol is 8 or 12, and the numerology (that is, the subcarrier interval) is 120 kHz. .

을 지정하는 방법의 일 예를 나타낸다. 즉, 도 14의 (a)는 SRS 자원(들) 앞의 PUSCH를 고려한 SRS 트리거링 DCI의 SRI 및 /또는 TPMI 전송 방법의 일 예를 나타낸다.14A is a beam(s) for transmission of an SRS allocated after a Y symbol (ie, a guard interval) through SRI and/or TPMI included in the DCI for triggering the SRS by the base station

It shows an example of how to designate. That is, (a) of FIG. 14 shows an example of a method of transmitting SRI and/or TPMI of SRS triggering DCI in consideration of PUSCH in front of SRS resource(s).

을 지정하는 방법의 일 예를 나타낸다. 즉, 도 14의 (b)는 SRS 자원(들) 뒤의 PUCCH 및/또는 PUSCH를 고려한 SRS 트리거링 DCI의 SRI 및/또는 TPMI 전송 방법의 일 예를 나타낸다.In addition, (b) of FIG. 14 shows the beam(s) for transmission of the SRS in consideration of the PUCCH and/or PUSCH after the Y symbol through the SRI and or TPMI included in the DCI for triggering the SRS by the base station.

It shows an example of how to designate. That is, (b) of FIG. 14 shows an example of a method of transmitting SRI and/or TPMI of SRS triggering DCI in consideration of PUCCH and/or PUSCH after SRS resource(s).

Method 1-3)

In Method 1-3, when the positions of other uplink transmissions (eg, PUCCH transmission, etc.) and Y symbols (ie, guard period, gap symbol) overlap (ie, conflict), Let's look at the methods.

(Method 1-3a)

First, a method of defining the SRS resource(s) and Y symbol as one SRS resource group, and defining and/or applying a priority rule between the corresponding SRS resource group and the PUCCH may be considered.

In the NR system, when a collision occurs between the SRS and the PUCCH for CSI (Channel State Information) reporting and/or the beam failure recovery request (e.g., short PUCCH (sPUCCH), etc.) , Any one is transmitted according to the priority as shown in Table 9 below, and any one may be dropped.

In Table 9, when the SRS is dropped, the drop may be partially performed in the time domain. That is, only OFDM symbols colliding with the sPUCCH among OFDM symbols for SRS may be dropped.

If the sPUCCH supports the beam failure recovery request, and a collision occurs between the sPUCCH and the aperiodic/semi-persistent/periodic SRS, the sPUCCH may have priority. In addition, the UE may assume that no collision between the aperiodic SRS and the sPUCCH only for aperiodic CSI reporting occurs.

At this time, as described above, the Y symbol is regarded as one group with the adjacent SRS resource(s) (ie, instead of the above-described SRS, {SRS resource(s) + Y symbol} is considered as one SRS group). A method of applying the same priority rule as 9 may be considered. Such a group may be referred to as an SRS group or an SRS resource group.

In other words, when a guard interval, that is, a Y symbol is set in relation to the SRS resource(s), the priority rule between the Y symbol and another uplink transmission (eg, sPUCCH transmission) is determined by the corresponding SRS resource(s) and the other uplink It may be set the same as the priority rule between link transmissions. That is, referring to Table 9, the priority rule between the Y symbol and the PUCCH may be set as shown in Table 10 below.

In this case, the SRS group (ie, SRS resource(s) and Y symbol gap) may be determined or set by explicit configuration or implicit configuration.

For example, as an explicit configuration method, the configuration of the Y symbol may be included in the SRS resource configuration (eg, SRS-Config, SRS resource set config, etc.). This may mean that the SRS resource(s) and Y symbol included in the SRS resource configuration are configured as one SRS group.

For another example, in the method of implicit configuration, when the SRS resource(s) of the Y symbol and the SRS resource(s) are located in the preceding symbol in the corresponding slot, the SRS resource(s) and the subsequent Y symbols are sequentially It can be considered as one SRS group. Alternatively, when the Y symbol among the Y symbol and the SRS resource(s) is located in the previous symbol in the corresponding slot, the Y symbol and the subsequent SRS resource(s) may be regarded as one SRS group in order. In this case, each SRS group must include at least one SRS resource, and the Y symbol may not be included. For example, in a symbol following the last SRS resource(s), a Y symbol may not be necessary and thus may not be set.

(Method 1-3b)

And/or, when the positions of the PUCCH and the Y symbol collide, the UE may be configured to drop the SRS symbol (ie, SRS resource(s)) and the Y symbol in front of the Y symbol together and transmit the PUCCH. That is, similar to the above-described method 1-3a), the SRS group is set and/or considered, but the UE is set to drop the SRS group instead of applying the above-described priority rule (eg, Table 9, Table 10). Can be.

(Method 1-3c)

And/or, when the positions of the PUCCH and the Y symbol collide, the UE may be configured to drop the PUCCH. That is, similar to the above-described method 1-3a), the SRS group is set and/or considered, but the UE is set to drop the PUCCH instead of applying the above-described priority rule (eg, Table 9, Table 10). I can.

(Method 1-3d)

And/or, the terminal may be configured not to expect a collision between the PUCCH and the Y symbol.

15 shows another example of a PUCCH transmission and SRS transmission method to which the method proposed in the present invention can be applied. 15 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 15, it is assumed that the number of symbols of the Y symbol is 2 as the starting position index of the Y symbol is 12 and the numerology (ie, subcarrier interval) is 120 kHz in the setting for the Y symbol (Example : G_SRS=13 in Table 6).

As shown in (a) of FIG. 15, when the relationship between the PUCCH triggering offset (M) and the SRS triggering offset (Z) is Z<M, the PUCCH symbols are transmitted at symbol indexes #12 and #13, and the SRS symbols are # If set to 8 to #11 symbol index, the PUCCH symbol and the Y symbol (ie, gap symbol, guard period) may collide.

In this case, by using the above-described method 1-3b, the SRS symbol and the Y symbol allocated before the Y symbol may be dropped, and the PUCCH may be allocated to the #12 and #13 symbol indexes. This can be expressed as shown in FIG. 15B.

Method 1-4)

The above-described method 1-3) proposes a solution to a case in which collision occurs between PUCCH and Y symbols. In the method 1-4), when the positions of the PUSCH and the Y symbol (ie, the gap symbol) collide, the operation of the base station and/or the terminal is described.

First, the terminal may be set to puncture the colliding Y symbol.

Alternatively, the terminal may be configured to perform a rate matching operation in consideration of colliding Y symbols. However, when transmitting the UL grant, the base station may instruct the UE to allocate UL data for which rate matching is already considered for a corresponding slot (ie, a slot in which a collision between PUSCH and Y symbol occurs).

Alternatively, the terminal may move the position of the SRS symbol to the next symbol position as much as the colliding Y symbol. For example, when the number of Y symbols is 2 and the SRS symbol position index is #8 to #11, the UE may move the SRS symbol position to the #10 to #13 symbol index. However, during SRS triggering, the base station may recognize that the Y symbol and the PUSCH symbol collide in the corresponding slot. That is, the corresponding base station may recognize that the SRS is shifted by Y symbols in the corresponding slot.

Alternatively, the terminal may be configured not to expect collision between the PUSCH symbols and the Y symbol.

Method 2)

As in Method 1 described above, when a separate Y symbol (ie, guard interval, gap symbol) between the base station and/or the terminal is not previously defined or configured, the base station for setting and/or determining the Y symbol and/or Let's look at the operation of the terminal.

When a separate Y symbol between the base station and/or the terminal is not previously defined or configured, a method for the terminal to determine the Y symbol may be considered.

When the Y symbol is determined by the UE and a collision occurs between the PUSCH and the SRS resource(s) (or the SRS group consisting of the SRS resource(s) and the Y symbol), it will be configured to perform an operation similar to the method 1 described above. I can. Specifically, the following exemplary terminal operations may be considered.

For example, regardless of other operations, the UE may be configured to report (reporting) (or feedback) the setting for the Y symbol (ie, the setting of the Y symbol gap) to the base station. In this case, the signaling scheme used may be used similarly to the scheme described in Method 1).

For another example, when the UE rate matching the PUSCH in consideration of the Y symbol, the UE may be configured to report information related to rate matching to the base station. For example, information related to rate matching may include whether rate matching is performed, a value for a Y symbol (ie, setting for a Y symbol), and the like.

When the UE transmits information related to rate matching through the PUSCH, it may transmit p symbols in front of the PUSCH using encoding independent of the PUSCH.

In addition, as a feedback method, the UE may transmit an MCS value considering rate matching through PUCCH or PUSCH. Alternatively, the terminal maintains and transmits the MCS indicated by the base station, but may transmit flag information (on/off) indicating whether rate matching is performed.

For another example, the UE moves the SRS and/or PUSCH symbol position in the opposite direction of the relative channel (eg, SRS or PUSCH) as much as the colliding Y symbol, and transmits information on the number of moved symbols to the PUSCH and/or PUCCH. It can be reported (ie, feedback) through.

For another example, the UE may puncture and transmit a PUSCH symbol colliding with the Y symbol. That is, the UE can transmit the SRS and PUSCH by puncturing the PUSCH symbol overlapping the Y symbol. In this case, the terminal may not perform an additional feedback operation for the base station.

In the present embodiment, the Y symbol (ie, guard interval, gap symbol) described above may be differently set and/or signaled between the SRS and the PUSCH and/or PUCCH. The PUCCH may be a short PUCCH (short PUCCH, sPUCCH) (eg, PUCCH format 0, 2) or a long PUCCH (long PUCCH) (eg, PUCCH format 1, 3, 4). In addition, the Y symbol (ie, guard period, gap symbol) may be differently designated for each UL bandwidth part (BWP).

(Second Example)

In the above-described first embodiment, a solution has been described when a guard period and another uplink transmission (eg, PUSCH and/or PUCCH transmission) collide (ie, overlap).

For reference, in the NR system, transmission timing may be set for each SRS resource set. That is, collisions between SRS resource sets may be additionally considered in the NR system.

Therefore, in the present embodiment hereinafter, when a collision occurs between the above-described guard interval and an SRS resource set (ie, SRS resources), methods for solving this will be described in detail.

Method 1)

The above-described Y symbol configuration is set for each SRS resource set, and such configuration may be performed through higher layer signaling (eg, RRC signaling). If a collision occurs between Y symbols (ie, guard intervals, gap symbols) and SRS resources belonging to different SRS resource sets in the same slot, the terminal and/or the base station may operate in the following manners.

First, the UE may not expect collisions between SRS resource sets. In addition, the terminal may not expect a collision between the SRS resource set and the Y symbol.

Alternatively, the terminal may drop the Y symbol set by the base station according to a priority rule between the SRS resource set including the colliding SRS resource and the SRS including the Y symbol. Specific methods for operating in consideration of the priority rule will be described below.

First, the UE allocates the SRS resource included in the SRS resource set having a high priority to the corresponding slot, and if the configuration for the Y symbol (ie, guard interval, gap symbol) in the configuration of the SRS resource set is If included, the corresponding symbol, that is, the Y symbol may be set to empty. Accordingly, all SRS resource sets having a lower priority among other SRS resource sets colliding in the same slot may be dropped, or only SRS resource(s) corresponding to the colliding symbols in the SRS resource set may be dropped.

In addition, when there is a collision between a specific SRS resource set in a different SRS resource set and a Y symbol within a (UL) slot, the colliding SRS resource has a higher priority compared to the Y symbol, or the conflicting SRS resource is Assume that the set SRS resource set has a higher priority than the set SRS resource set with the Y symbol. In this case, the UE may be configured to allocate SRS resources having a high priority and drop only Y symbols having a low priority. Alternatively, the UE may drop the entire SRS resource set including the Y symbol for the SRS resource set having a low priority. Alternatively, the UE may drop an SRS group (ie, SRS resource(s) and Y symbols) including Y symbols having a low priority.

In addition, the SRS resource included in the SRS resource set at which the reception time of the DCI including the aperiodic SRS trigger (i.e., DCI for aperiodic SRS triggering) is higher than the Y symbol belonging to the slower SRS resource set. It can be set to have priority. Or, on the contrary, the SRS resource included in the SRS resource set at which the reception time of the DCI including the aperiodic SRS trigger (i.e., DCI for aperiodic SRS triggering) is slower is the Y symbol belonging to the faster SRS resource set It can be set to have a higher priority.

In addition, when the SRS resource included in the aperiodic SRS resource set collides with the Y symbol set in the periodic and/or semi-persistent SRS resource set, the terminal drops the entire aperiodic SRS resource set or collides with the Y symbol. It is also possible to drop only the SRS resource symbol(s). Or, when the Y symbol included in the aperiodic SRS resource set collides with the SRS resource set in the periodic and/or semi-persistent SRS resource set, the terminal drops the entire corresponding periodic and/or semi-persistent SRS resource set, or It is also possible to drop only the SRS resource symbol(s) that collide with the Y symbol.

In addition, a priority rule between the Y symbol and each SRS resource set may be defined according to the use of the SRS resource set (eg, RRC parameter SRS-SetUse, usage). For example, when the priority rule is set to'Y symbol of SRS resource set for antenna switching (ie, antenna switching-based SRS resource set)> SRS resource set for codebook (ie, codebook-based SRS resource set)' Let's assume In this case, since the Y symbol in the SRS resource set configuration for antenna switching has a high priority, if the SRS resource set for the antenna switching and the SRS resource set for the codebook collide within the slot, the UE is the SRS for the codebook base. It is also possible to drop a resource set or drop only the symbol(s) in which the collision occurred.

Method 1-1)

The SRS group (i.e., SRS resource group) is defined as a composition (i.e., N+K symbols) of some or all of the SRS resource(s) (eg, N symbols) and Y symbols (eg, K symbols). I can. Alternatively, the SRS group (ie, SRS resource group) may be defined as a configuration (ie, M+K symbols) of M SRS symbols including SRS resource(s) and Y symbols (eg, K symbols). have.

In addition, the positions of the Y symbol and the SRS resource symbol in the SRS group are arranged in the order of [SRS resource symbols (N), Y symbol (K)], or [Y symbol (K), SRS resource symbols (N)] They may be arranged in order, [SRS symbols (M), Y symbols (K)]), or arranged in order of [Y symbols (K), SRS symbols (M)].

The SRS group as described above may be defined for consecutive symbols.

At this time, the operations of the terminal and/or the base station in the case of a collision between SRS groups will be described. In the following description, the operation of the terminal according to the priority may be indicated or set by the base station, or may be predefined on the system.

First, the UE may allocate an SRS group having a high priority through uplink transmission, and may drop only Y symbols set in the SRS group having a low priority. Alternatively, the UE may drop the entire SRS group including the Y symbol for the SRS group having a low priority. Alternatively, the UE may drop only SRS resources in which Y symbols in the SRS group having a low priority are set.

In addition, for drop setting in the SRS group having a low priority, operations such as the following examples may be considered.

For example, a parameter indicating the number of dropped symbols (L<M+K or L<N+K) in the SRS group may be set through higher layer signaling. That is, the base station may transmit parameter information indicating the number of symbols dropped in the SRS group to the terminal through higher layer signaling (eg, RRC signaling). The order of the dropped symbols L may be implicitly defined according to the positions of the Y symbols and the SRS resource symbol(s) in the SRS group. As a specific example, when L=2 is set, when the dropped SRS group consists of one Y symbol and four SRS symbols representing one SRS resource, the terminal 2 in ascending order from the start symbol (n) of the SRS group. You can drop up to a symbol (n+1). Alternatively, when an SRS group that is dropped in one symbol gap after four SRS symbols representing one SRS resource is set, the UE has two previous symbols (n-1) in descending order from the last symbol (n) of the SRS group. ) Can also be dropped.

In addition, for another example, flag information indicating a direction of progression of a symbol dropped in the SRS group (eg, Drop_order_SRSresourceGroup) may be set through higher layer signaling. That is, the base station may transmit flag information indicating the progress direction of the symbol dropped in the SRS group to the terminal through higher layer signaling. As a specific example, when Drop_order_SRSresourceGroup=0, the terminal may sequentially drop the SRS group from the first symbol. Conversely, when Drop_order_SRSresourceGroup=1, the UE may sequentially drop the SRS group from the last symbol.

Method 1-2)

In addition, the configured SRS group (ie, SRS resource group) may be reset according to the collision between the PUCCH and/or PUSCH resource relationship of the UE, and/or SRS resources (and/or SRS resource set). The reconfiguration of the structure of the SRS group may be set by the base station or may be implicitly set by the UE in case of collision.

The base station and/or the terminal may configure a reconfiguration method for the structure of the SRS group through higher layer signaling. Alternatively, when a PUCCH configuration (eg, DCI) having a higher priority than the PUSCH is transmitted at a timing earlier than the SRS triggering timing, configuration information on the reconfiguration operation of the SRS group may be transmitted through the corresponding DCI. Alternatively, the terminal may perform reconfiguration of the SRS group structure and transmit (or report) information on the changed SRS group structure to the base station.

In this case, the SRS resource(s) in the SRS group allocated to the PUSCH region may be dropped. Such an operation type may be predefined, determined or promised between the base station and/or the terminal.

Alternatively, the terminal may transmit feedback information representing (or indicating) a change in the structure of the SRS group to the base station through PUSCH and/or PUCCH. The structure information on the changed SRS group may include the location of the Y symbol and the location of the SRS resource symbol. In addition, candidates for the SRS group structure are set through higher layer signaling (eg, RRC signaling), and a corresponding index may be transmitted through uplink control information (UCI).

16 shows an example of a PUSCH transmission, PUCCH transmission, and SRS transmission method to which the method proposed in the present specification can be applied. 16 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 16, the SRS resource set consists of two SRS resource groups (SRS resource group 0 and SRS resource group 1), and according to the numerology (ie, subcarrier interval) of 120 kHz, the Y symbol, that is, the gap It is assumed that the number of symbols of the symbol is 2.

In addition, k denotes a timing offset between UL grant and PUSCH transmission, i denotes a timing offset between SRS triggering DCI and SRS transmission, j denotes DCI for PUCCH transmission (e.g., DCI for ACK/NACK request) and It may mean a timing offset between PUCCH transmissions.

As shown in (a) of FIG. 16, the UE receives a UL grant for PUSCH transmission at a point in time n (i.e., an n-th slot) from the base station, and an aperiodic SRS trigger indicating SRS transmission at the same point in time (i.e., Aperiodic SRS triggering DCI) may be received from the base station at a time n-k+i (k>i). At this time, the configuration of the first SRS group (i.e., SRS resource group 0) is allocated to two symbols in which the Y symbol (i.e., the gap symbol) is #6 and #7 symbol index, and the SRS resource to the #8 symbol index Can be set to be assigned. In addition, a second SRS group (ie, SRS resource group 1) having a similar structure may be continuously set to the first SRS group. The second SRS group is composed of two Y symbols and one SRS resource in the same manner as the first SRS group, and only the position of the symbol is moved within the slot.

However, the UE receives the scheduling DCI of PUCCH transmission for HARQ ACK/NACK (A/N) transmissions for PDSCH reception at n-k+i+j time point (k>i+j) and transmits PUCCH at the same time n There may be cases where this is required. In this case, the terminal may switch the front/rear of the corresponding SRS group as shown in FIG. 16(b). In other words, the UE may be configured to perform PUSCH, SRS and/or PUCCH transmission by allocating the SRS resource of the corresponding SRS group to the #6 symbol index, and allocating the Y symbol to the #7 and #8 symbol index.

Method 2)

As described above, when a collision occurs between the Y symbol and the SRS resource set, the collided SRS resource set may be set to be transmitted after the next slot (ie, UL slot), another SRS transmission slot, or K slot. For example, when a collision occurs in the n-th slot, the terminal may be configured to transmit the SRS resource in the n+K-th slot.

Here, parameter information (eg, K) for transmission timing of the SRS resource set may be preset or defined between the base station and/or the terminal, or may be configured through higher layer signaling (eg, RRC signaling).

Method 3)

In addition, unlike the above-described method 2, a collision occurs between the Y symbol of the SRS resource set(s) in which the Y symbol is set among the SRS resource set(s) set in one slot and the other SRS resource set(s). If so, the UE may be configured to transmit the SRS resource set including the corresponding Y symbol after the next slot (ie, UL slot), the next SRS transmission slot, or after the K slot.

At this time, parameter information for the transmission timing of the SRS resource set with the corresponding Y symbol configuration (eg, the K) is preset or defined between the base station and/or the terminal, or through higher layer signaling (eg, RRC signaling), etc. It can also be set. In other words, the parameter information may be set in the SRS setting or the SRS resource set configuration (eg, SRS resource set of SRS-Config).

The transmission position (ie, transmission symbol position) of the SRS resource set transmitted in the next slot due to the above-described collision may be set in the terminal and/or the base station through higher layer signaling.

In addition, when the changed (ie, moved) SRS resource set due to collision collides with another channel and/or signal (eg, reference signal)(s) again in the corresponding slot, the UE drops the entire SRS resource set, or SRS transmission may be dropped only on colliding symbols. Alternatively, in this case, the UE may perform uplink transmission according to a priority rule between a collided SRS resource set and a different channel and/or signal(s). For example, when the SRS resource set has higher priority than other channels and/or signals, the UE may perform (or allocate) SRS transmission, and conversely, when the SRS resource set has a lower priority than other channels and/or signals. The terminal may drop the SRS transmission. Alternatively, the terminal may be configured not to expect a collision between the changed (ie, moved) SRS resource set and another channel and/or signal(s) due to collision.

Through the above-described methods proposed in the present specification, there is an effect of reducing performance degradation due to distortion caused by antenna switching during UL transmission (eg, PUSCH, PUCCH, etc.). Specifically, when the antenna switching of the SRS in the NR system, when mismatching of the UE transmission beam occurs between the SRS resource and the PUSCH or PUCCH located in the front or rear symbol according to the SRS antenna switching, a symbol for preventing this ( That is, there is an effect that the above-described Y symbol) can be efficiently set.

17 shows an example of a flowchart of an operation of a terminal performing SRS transmission in a wireless communication system to which the method proposed in the present specification can be applied. 17 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 17, it is assumed that a terminal and/or a base station transmits and receives an SRS based on the embodiments and methods described above in the present specification. In particular, the UE and/or the base station may perform SRS transmission in consideration of the collision between the SRS and/or Y symbol and other uplink transmission in consideration of the priority rules (eg, Table 10, etc.) proposed in this specification have.

First, the terminal may receive configuration information (eg, SRS_Config) for transmission of the SRS from the base station (S1705). For example, the configuration information may include information on one or more SRS resources for transmission of the SRS and usage of the one or more SRS resources.

Thereafter, the terminal may perform SRS transmission to the base station using the one or more resources (S1710).

In this case, a guard period (eg, the aforementioned Y symbol) related to the one or more SRS resources may be set. For example, the guard interval may be set between SRS resources, and the position of the guard interval may be set by the base station and/or the terminal. Accordingly, the guard period may be located between SRS resources, or between the SRS resources and other uplink channels.

When the guard period and transmission of a specific uplink channel set for the terminal overlap, the priority between the guard period and the specific uplink channel (eg, Table 10 above) is determined by the SRS and the specific The priority between uplink channels may be set the same as in Table 9 described above. For example, the priority rule between the Y symbol and the PUCCH (particularly, sPUCCH) described above may follow the priority rule between the SRS and the PUCCH (particularly, sPUCCH). Here, the (s)PUCCH may be (s)PUCCH for a CSI report or a request for beam failure recovery. When (s) PUCCH is configured for beam failure recovery, the (s) SRS resource and guard interval overlapping with the PUCCH may be dropped.

In addition, when the purpose is set to antenna switching, the guard period may be set for the antenna switching.

In addition, the number of symbols in the guard interval may be set in consideration of a subcarrier interval (ie, neurology) set for transmission of the SRS. As an example, the Y symbol may be set to 1 symbol or 2 symbols according to the neurology.

In addition, the configuration information for the guard interval may be set for each SRS resource set through higher layer signaling or the like. As an example, as described above, the setting information for the guard interval includes a starting position index of the guard interval, the number of symbols of the guard interval, and/or transmission of another uplink channel adjacent to the transmission of the SRS. It may include information indicating whether the guard interval is set between.

이 이용될 수 있다. 이 경우, 상술한 전송 빔은 SRS 자원 지시자(SRI) 및/또는 전송 프리코더 행렬 지시자(TPMI)에 의해 지시될 수 있다.In addition, when the guard period is not set, the terminal may be configured to perform uplink transmission before the guard period and uplink transmission after the guard period using the same transmission beam (and/or antenna port). have. For example, as shown in FIG. 13 or 14 described above, the same transmission beam for transmission of adjacent PUSCHs and SRSs

Can be used. In this case, the above-described transmission beam may be indicated by an SRS resource indicator (SRI) and/or a transmission precoder matrix indicator (TPMI).

In this regard, the operation of the terminal described above may be specifically implemented by the terminal device 1920 shown in FIGS. 19 and 20 of the present specification. For example, the operation of the terminal described above may be performed by the processors 1921 and 2010 and/or the RF units (or modules) 1923 and 2035.

First, the processors 1921 and 2010 may control the RF units (or modules) 1923 and 2035 to receive configuration information (eg, SRS_Config) for transmission of the SRS from the base station 1910 (S1705). . For example, the configuration information may include information on one or more SRS resources for transmission of the SRS and usage of the one or more SRS resources.

Thereafter, the processors 1921 and 2010 may control the RF units (or modules) 1923 and 2035 to perform SRS transmission using the one or more resources to the base station 1910 (S1710).

In this case, a guard period (eg, the aforementioned Y symbol) related to the one or more SRS resources may be set. For example, the guard interval may be set between SRS resources, and the position of the guard interval may be set by the base station and/or the terminal. Accordingly, the guard period may be located between SRS resources, or between the SRS resources and other uplink channels.

When the guard period and transmission of a specific uplink channel set for the terminal overlap, the priority between the guard period and the specific uplink channel (eg, Table 10 above) is determined by the SRS and the specific The priority between uplink channels may be set the same as in Table 9 described above. For example, the priority rule between the Y symbol and the PUCCH (particularly, sPUCCH) described above may follow the priority rule between the SRS and the PUCCH (particularly, sPUCCH). Here, the (s)PUCCH may be (s)PUCCH for a CSI report or a request for beam failure recovery. When (s) PUCCH is configured for beam failure recovery, the (s) SRS resource and guard interval overlapping with the PUCCH may be dropped.

In addition, when the purpose is set to antenna switching, the guard period may be set for the antenna switching.

In addition, the number of symbols in the guard interval may be set in consideration of a subcarrier interval (ie, neurology) set for transmission of the SRS. As an example, the Y symbol may be set to 1 symbol or 2 symbols according to the neurology.

In addition, the configuration information for the guard interval may be set for each SRS resource set through higher layer signaling or the like. As an example, as described above, the setting information for the guard interval includes a starting position index of the guard interval, the number of symbols of the guard interval, and/or transmission of another uplink channel adjacent to the transmission of the SRS. It may include information indicating whether the guard interval is set between.

이 이용될 수 있다. 이 경우, 상술한 전송 빔은 SRS 자원 지시자(SRI) 및/또는 전송 프리코더 행렬 지시자(TPMI)에 의해 지시될 수 있다.In addition, when the guard period is not set, the terminal may be configured to perform uplink transmission before the guard period and uplink transmission after the guard period using the same transmission beam (and/or antenna port). have. For example, as shown in FIG. 13 or 14 described above, the same transmission beam for transmission of adjacent PUSCHs and SRSs

Can be used. In this case, the above-described transmission beam may be indicated by an SRS resource indicator (SRI) and/or a transmission precoder matrix indicator (TPMI).

18 shows an example of an operation flowchart of a base station performing SRS reception in a wireless communication system to which the method proposed in this specification can be applied. 18 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 18, it is assumed that a terminal and/or a base station transmits and receives an SRS based on the embodiments and methods described above in the present specification. In particular, the UE and/or the base station may perform SRS transmission in consideration of the collision between the SRS and/or Y symbol and other uplink transmission in consideration of the priority rules (eg, Table 10, etc.) proposed in this specification. have.

First, the base station may transmit configuration information (eg, SRS_Config) for transmission of the SRS to the terminal (S1805). For example, the configuration information may include information on one or more SRS resources for transmission of the SRS and usage of the one or more SRS resources.

Thereafter, the base station may perform SRS reception from the terminal by using the one or more resources (S1810).

In this case, a guard period (eg, the aforementioned Y symbol) related to the one or more SRS resources may be set. For example, the guard interval may be set between SRS resources, and the position of the guard interval may be set by the base station and/or the terminal. Accordingly, the guard period may be located between SRS resources, or between the SRS resources and other uplink channels.

When the guard period and transmission of a specific uplink channel set for the terminal overlap, the priority between the guard period and the specific uplink channel (eg, Table 10 above) is determined by the SRS and the specific The priority between uplink channels may be set the same as in Table 9 described above. For example, the priority rule between the Y symbol and the PUCCH (particularly, sPUCCH) described above may follow the priority rule between the SRS and the PUCCH (particularly, sPUCCH). Here, the (s)PUCCH may be (s)PUCCH for a CSI report or a request for beam failure recovery. When (s) PUCCH is configured for beam failure recovery, the (s) SRS resource and guard interval overlapping with the PUCCH may be dropped.

In addition, when the purpose is set to antenna switching, the guard period may be set for the antenna switching.

In addition, the number of symbols in the guard interval may be set in consideration of a subcarrier interval (ie, neurology) set for transmission of the SRS. As an example, the Y symbol may be set to 1 symbol or 2 symbols according to the neurology.

In addition, the configuration information for the guard interval may be set for each SRS resource set through higher layer signaling or the like. As an example, as described above, the setting information for the guard interval includes a starting position index of the guard interval, the number of symbols of the guard interval, and/or transmission of another uplink channel adjacent to the transmission of the SRS. It may include information indicating whether the guard interval is set between.

이 이용될 수 있다. 이 경우, 상술한 전송 빔은 SRS 자원 지시자(SRI) 및/또는 전송 프리코더 행렬 지시자(TPMI)에 의해 지시될 수 있다.In addition, when the guard period is not set, the terminal may be configured to perform uplink transmission before the guard period and uplink transmission after the guard period using the same transmission beam (and/or antenna port). have. For example, as shown in FIG. 13 or 14 described above, the same transmission beam for transmission of adjacent PUSCHs and SRSs

Can be used. In this case, the above-described transmission beam may be indicated by an SRS resource indicator (SRI) and/or a transmission precoder matrix indicator (TPMI).

In this regard, the operation of the base station described above may be specifically implemented by the base station apparatus 1910 shown in FIG. 19 of the present specification. For example, the operation of the base station described above may be performed by the processor 1911 and/or the RF unit (or module) 1913.

First, the processor 1911 may control the RF unit (or module) 1913 to transmit configuration information (eg, SRS_Config) for transmission of the SRS to the terminal 1920 (S1805). For example, the configuration information may include information on one or more SRS resources for transmission of the SRS and usage of the one or more SRS resources.

Thereafter, the processor 1911 may control the RF unit (or module) 1913 from the terminal 1920 to perform SRS reception using the one or more resources (S1810).

In this case, a guard period (eg, the aforementioned Y symbol) related to the one or more SRS resources may be set. For example, the guard interval may be set between SRS resources, and the position of the guard interval may be set by the base station and/or the terminal. Accordingly, the guard period may be located between SRS resources, or between the SRS resources and other uplink channels.

When the guard period and transmission of a specific uplink channel set for the terminal overlap, the priority between the guard period and the specific uplink channel (eg, Table 10 above) is determined by the SRS and the specific The priority between uplink channels may be set the same as in Table 9 described above. For example, the priority rule between the Y symbol and the PUCCH (particularly, sPUCCH) described above may follow the priority rule between the SRS and the PUCCH (particularly, sPUCCH). Here, the (s)PUCCH may be (s)PUCCH for a CSI report or a request for beam failure recovery. When (s) PUCCH is configured for beam failure recovery, the (s) SRS resource and guard interval overlapping with the PUCCH may be dropped.

In addition, when the purpose is set to antenna switching, the guard period may be set for the antenna switching.

In addition, the number of symbols in the guard interval may be set in consideration of a subcarrier interval (ie, neurology) set for transmission of the SRS. As an example, the Y symbol may be set to 1 symbol or 2 symbols according to the neurology.

In addition, the configuration information for the guard interval may be set for each SRS resource set through higher layer signaling or the like. As an example, as described above, the setting information for the guard interval includes a starting position index of the guard interval, the number of symbols of the guard interval, and/or transmission of another uplink channel adjacent to the transmission of the SRS. It may include information indicating whether the guard interval is set between.

이 이용될 수 있다. 이 경우, 상술한 전송 빔은 SRS 자원 지시자(SRI) 및/또는 전송 프리코더 행렬 지시자(TPMI)에 의해 지시될 수 있다.In addition, when the guard period is not set, the terminal may be configured to perform uplink transmission before the guard period and uplink transmission after the guard period using the same transmission beam (and/or antenna port). have. For example, as shown in FIG. 13 or 14 described above, the same transmission beam for transmission of adjacent PUSCHs and SRSs

Can be used. In this case, the above-described transmission beam may be indicated by an SRS resource indicator (SRI) and/or a transmission precoder matrix indicator (TPMI).

In the operation proposed in the present specification, component carrier (CC) hopping is performed for SRS transmission, so that different CCs, in particular, an SRS resource set set in an intra-band CC, and/or other uplink transmission (eg, PUSCH , PUCCH) and a Y symbol (ie, a gap symbol) may be equally applied.

In addition, when applying the methods proposed in the present specification, it goes without saying that each method may be applied alone or may be applied in combination with each other.

In addition, the methods proposed in this specification have been described based on a 3GPP LTE system and an NR system for convenience of description, but the range of systems to which the methods are applied is a system other than the 3GPP LTE system and NR system (eg, UTRA, etc.), Of course, it can also be extended to 5G and its candidate technologies.

General devices to which the present invention can be applied

19 illustrates a block diagram of a wireless communication device to which the methods proposed in the present specification can be applied.

Referring to FIG. 19, a wireless communication system includes a base station 1910 and a plurality of terminals 1920 located within an area of the base station 1910.

The base station 1910 includes a processor (processor, 1911), a memory (memory, 1912), and an RF unit (radio frequency unit, 1913). The processor 1911 implements the functions, processes and/or methods proposed in FIGS. 1 to 18 above. Layers of the air interface protocol may be implemented by the processor 1911. The memory 1912 is connected to the processor 1911 and stores various information for driving the processor 1911. The RF unit 1913 is connected to the processor 1911 and transmits and/or receives a radio signal.

The terminal 1920 includes a processor 1921, a memory 1922, and an RF unit 1923.

The processor 1921 implements the functions, processes and/or methods proposed in FIGS. 1 to 18 above. Layers of the air interface protocol may be implemented by the processor 1921. The memory 1922 is connected to the processor 1921 and stores various information for driving the processor 1921. The RF unit 1923 is connected to the processor 1921 and transmits and/or receives a radio signal.

The memories 1912 and 1922 may be inside or outside the processors 1911 and 1921, and may be connected to the processors 1911 and 1921 by various well-known means.

As an example, in order to transmit and receive downlink data (DL data) in a wireless communication system supporting a low latency service, a terminal provides a radio frequency (RF) unit for transmitting and receiving a radio signal, and a functional unit with the RF unit. It may include a processor connected to.

In addition, the base station 1910 and/or the terminal 1920 may have one antenna or multiple antennas.

20 illustrates a block diagram of a communication device according to an embodiment of the present invention.

In particular, FIG. 20 is a diagram illustrating the terminal of FIG. 19 in more detail above.

Referring to FIG. 20, the terminal is a processor (or digital signal processor (DSP) 2010), an RF module (or RF unit) 2035, a power management module (power management module) (2005). ), antenna (2040), battery (2055), display (2015), keypad (2020), memory (2030), SIM (Subscriber Identification Module) )card) 2025 (this configuration is optional), a speaker 2045 and a microphone 2050. The terminal may also include a single antenna or multiple antennas. I can.

The processor 2010 implements the functions, processes and/or methods suggested in FIGS. 1 to 18 above. The layer of the air interface protocol may be implemented by the processor 2010.

The memory 2030 is connected to the processor 2010 and stores information related to the operation of the processor 2010. The memory 2030 may be inside or outside the processor 2010, and may be connected to the processor 2010 by various well-known means.

The user inputs command information such as a telephone number, for example, by pressing (or touching) a button on the keypad 2020 or by voice activation using the microphone 2050. The processor 2010 receives the command information and processes to perform an appropriate function, such as dialing a phone number. Operational data may be extracted from the SIM card 2025 or the memory 2030. Also, the processor 2010 may display command information or driving information on the display 2015 for the user to recognize and for convenience.

The RF module 2035 is connected to the processor 2010 and transmits and/or receives an RF signal. The processor 2010 transmits command information to the RF module 2035 to transmit, for example, a radio signal constituting voice communication data in order to initiate communication. The RF module 2035 is composed of a receiver and a transmitter to receive and transmit radio signals. The antenna 2040 functions to transmit and receive radio signals. When receiving a radio signal, the RF module 2035 may transmit a signal for processing by the processor 2010 and convert the signal into a baseband. The processed signal may be converted into audible or readable information output through the speaker 2045.

21 is a diagram showing an example of an RF module of a wireless communication device to which the method proposed in the present specification can be applied.

Specifically, FIG. 21 shows an example of an RF module that can be implemented in a frequency division duplex (FDD) system.

First, in the transmission path, the processor described in FIGS. 19 and 20 processes data to be transmitted and provides an analog output signal to the transmitter 2110.

Within the transmitter 2110, the analog output signal is filtered by a low pass filter (LPF) 2111 to remove images caused by digital-to-analog conversion (ADC), and the up converter ( It is up-converted from baseband to RF by a mixer 2112, amplified by a variable gain amplifier (VGA) 2113, and the amplified signal is filtered by a filter 2114, and a power amplifier (Power Amplifier, PA) is further amplified by 2115, routed through the duplexer(s) 2150/antenna switch(s) 2160, and transmitted through the antenna 2170.

In addition, in the receive path, the antenna receives signals from the outside and provides the received signals, these signals are routed through the antenna switch(s) 2160/duplexers 2150 and provided to the receiver 2120. .

In the receiver 2120, the received signals are amplified by a low noise amplifier (LNA) 2123, filtered by a bandpass filter 2124, and from the RF by a down converter (Mixer, 2125). It is down-converted to the baseband.

The down-converted signal is filtered by a low pass filter (LPF, 2126) and amplified by a VGA 2127 to obtain an analog input signal, which is provided to the processors described in FIGS. 19 and 20.

In addition, a local oscillator (LO) generator 2140 provides transmit and receive LO signals to the generation and up converter 2112 and down converter 2125, respectively.

In addition, a phase locked loop (PLL) 2130 receives control information from the processor to generate transmit and receive LO signals at appropriate frequencies and provides control signals to the LO generator 2140.

Further, the circuits shown in FIG. 21 may be arranged differently from the configuration shown in FIG. 21.

22 is a diagram illustrating another example of an RF module of a wireless communication device to which the method proposed in the present specification can be applied.

Specifically, FIG. 22 shows an example of an RF module that can be implemented in a Time Division Duplex (TDD) system.

The transmitter 2210 and receiver 2220 of the RF module in the TDD system have the same structure as the transmitter and receiver of the RF module in the FDD system.

Hereinafter, the RF module of the TDD system will only look at a structure different from the RF module of the FDD system, and the description of FIG. 17 will be referred for the same structure.

The signal amplified by the transmitter's power amplifier (PA) 2215 is routed through a band select switch (2250), a band pass filter (BPF, 2260) and antenna switch(s) 2270 And transmitted through the antenna 2280.

Further, in the receive path, the antenna receives signals from the outside to provide the received signals, and these signals are routed through the antenna switch(s) 2270, the band pass filter 2260 and the band select switch 2250. , Provided to the receiver 2220.

The embodiments described above are those in which components and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, it is also possible to construct an embodiment of the present invention by combining some components and/or features. The order of operations described in the embodiments of the present invention may be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is apparent that claims that do not have an explicit citation relationship in the claims may be combined to constitute an embodiment or may be included as a new claim by amendment after filing.

The embodiment according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of implementation by hardware, an embodiment of the present invention includes one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, etc.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, or function that performs the functions or operations described above. The software code can be stored in a memory and driven by a processor. The memory may be located inside or outside the processor, and may exchange data with the processor through various known means.

It is obvious to a person skilled in the art that the present invention can be embodied in other specific forms without departing from the essential features of the present invention. Therefore, the above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

The method of transmitting and receiving the sounding reference signal in the wireless communication system of the present invention has been described mainly in the example applied to the 3GPP LTE/LTE-A system and 5G system (New RAT system), but it is also applied to various wireless communication systems. It is possible.

Claims (15)

In a method for a terminal to transmit a sounding reference signal (SRS) in a wireless communication system,
Receiving, from a base station, configuration information for transmission of the SRS;
The configuration information includes information on one or more SRS resources for transmission of the SRS, and the one or more SRS resources are configured for antenna switching,
To the base station, including the step of performing the transmission of the SRS using the one or more SRS resources,
A guard period related to the one or more SRS resources is set,
When transmission of the guard period and a specific uplink channel configured for the terminal overlap, the priority between the guard period and the specific uplink channel is determined by the SRS and the specific uplink channel. Method, characterized in that the same set as the priority between channels. The method of claim 1,
The method of claim 1, wherein the guard period is set for switching the antenna. The method of claim 2,
The specific uplink channel is a physical uplink control channel (PUCCH) for reporting channel state information (CSI) or beam failure recovery. The method of claim 3,
When the PUCCH is configured for beam failure recovery, an SRS resource and a guard interval overlapping with the PUCCH are dropped. The method of claim 2,
The number of symbols of the guard period is set based on a subcarrier spacing set for transmission of the SRS. The method of claim 5,
The method of claim 1, wherein the number of symbols in the guard interval is 1 or 2. The method of claim 2,
The configuration information for the guard interval is set for each SRS resource set through higher layer signaling. The method of claim 7,
The setting information for the guard interval includes a starting position index of the guard interval, the number of symbols of the guard interval, and/or whether the guard interval is set between transmission of the SRS and transmission of another adjacent uplink channel. Method comprising the information representing the. The method of claim 2,
When the guard period is not set, the terminal is configured to perform uplink transmission before the guard period and uplink transmission after the guard period using the same transmission beam. The method of claim 9,
The transmission beam is characterized in that indicated by an SRS resource indicator (SRS Resource Indicator, SRI) and/or a transmit precoder matrix indicator (TPMI). In a terminal performing transmission of a sounding reference signal (SRS) in a wireless communication system,
An RF (Radio Frequency) unit for transmitting and receiving a radio signal,
Including a processor functionally connected to the RF unit,
The processor,
Receiving configuration information for transmission of the SRS from a base station;
The configuration information includes information on one or more SRS resources for transmission of the SRS, and the one or more SRS resources are configured for antenna switching,
Controlling to the base station to perform the transmission of the SRS using the one or more SRS resources,
A guard period related to the one or more SRS resources is set,
When transmission of the guard period and a specific uplink channel configured for the terminal overlap, the priority between the guard period and the specific uplink channel is determined by the SRS and the specific uplink channel. Terminal, characterized in that the same set as the priority between channels. The method of claim 11,
The terminal, characterized in that the guard period is set for the antenna switching. The method of claim 12,
The specific uplink channel is a physical uplink control channel (PUCCH) for reporting channel state information (CSI) or beam failure recovery. The method of claim 12,
The number of symbols of the guard period is set based on a subcarrier spacing set for transmission of the SRS. In a base station for receiving a sounding reference signal (SRS) in a wireless communication system,
An RF (Radio Frequency) unit for transmitting and receiving a radio signal,
Including a processor functionally connected to the RF unit,
The processor,
Transmitting configuration information for transmission of the SRS to the terminal;
The configuration information includes information on one or more SRS resources for transmission of the SRS, and the one or more SRS resources are configured for antenna switching,
From the terminal, control to perform the reception of the SRS using the one or more SRS resources,
A guard period related to the one or more SRS resources is set,
When transmission of the guard period and a specific uplink channel configured for the terminal overlap, the priority between the guard period and the specific uplink channel is determined by the SRS and the specific uplink channel. Base station, characterized in that the same set as the priority between channels.

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